This pattern developed by Skip Morris has many variations between colors, tail materials, and weight options. It can be tied without lead or wire to be strictly a topwater slider, or with the addition of some weight to keep it under with a near nuetral bouyancy after the first sharp strip of line. The ventral surface of the fly is best secured with Softex, epoxy, or other adhesive to keep wraps around the underbody of foam secure.

The fly pictured here has no weight, and marabou for a tail. It's strictly a topwater fly.

Here's a picture of the underside of another fly in the same color scheme, showing the underbody of foam secured with spiral thread wraps and Softex. This particular fly also has wire for weight, and a zonker tail for a slightly different action underwater.